A combined process of hydrolysis de esterification and ozone oxidation is designed for the pretreatment of plasticizer wastewater characterized by high CODcr concentration,high organic nitrogen content and poor biodegradability in a fine chemical enterprise.The main process of"hydrolysis acidification+two-stage expended granular sludge bed(EGSB)+two-stage anoxic-oxic(A/O)+two-stage aerobic biological fluidized tank(ABFT)+coagulation-sedimentation"is used for the treatment of the comprehensive wastewater.The effluent water quality met the Emission standard of pollutants for petroleum chemistry industry(GB31571-2015),and reached the required standard of the sewage treatment plant in the park.
关键词
精细化工废水/臭氧氧化/厌氧颗粒污泥膨胀床反应器/缺氧-好氧/曝气生物流化池
Key words
Fine chemical wastewater/Ozone oxidation/expended granular sludge bed(EGSB)/anoxic-oxic(A/O)/Aerobic biological fluidized tank(ABFT)
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